Fuel mixer for internal-combustion engines



Jan. '12, 1926. 1,569,519

- E. H. MIDDAUGH FUEL MIXER FOR INTERNAL COMBUSTION ENGINES Filed Jan. 15, 1924 mrmvm/a Z/m er )1. middauffl Patented Jan. 12, 192%.

UNITED I STATES ELMEB H. MIDDAUGI-I, or ALnMAzoo, MICHIGAN.

FUEL MIXER FOR INTERNAL-COMBUSTION ENGINES.

Application filed January 15, 1924. Serial No. 686,256.

To all whom it may concern:

Be it known that I, ELMER I-I. MIDDAUGH, a citizen of the United States, residing at the city and county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Fuel Mixers for InternalCombustion Engines, of which the following is a specification.

This invention relates to improvements in fuel mixers for internal combustion engines.

The main object of this invention is to provide an improved fuel mixer for internal combustion engines adapted to be interposed between the intake pipe of a manifold and the carburetor, which is effective in mixing the air and fuel and in preventing the passage into the manifold of unvaporized hydrocarbon.

A further object is to provide a structure having these advantages which is very economical to produce and easily installed.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention 18 clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this application, in which:

Fig. I is a detail front elevation of a structure equipped with or embodying m improvements.

Fig. II is a horizontal section on a line corresponding to line 22 of Fig. I.

Fig. III is an enlarged vertical section on a line corresponding to line 33 of Fig. II.

In the drawing the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and similar numerals of reference refer to similar parts in all of the views.

Referring to the drawing, 1 represents a carburetor and 2 the intake manifold of an internal combustion engine. These parts are shown conventionally.

The carburetor is provided with an attaching flange 3 while the intake manifold has a coacting attaching flange 1 adapted to receive the attaching screws 5.

My improved mixing device comprises an internal tubular member 6 and an external member 7 sleeved together and adapted to fit within the intake pipe 8 of the manifold 2. The members 6 and 7 are provided with attaching flanges 9 and 10 respectively havmg a gasket 11 of copper asbestos sheet interposed between them, these flanges being clamped between the flanges 3 and 4 of the carburetor of the manifold.

The members 6 and 7 are preferably made of thin brass or other non-corrodible metal, the flanges 9 and 10, with the gasket interposed between them, readily conforming and making a tight joint between the carburetor and manifold. The members 6 and 7 are provided with inturned curved flanges 12 and 13 at their upper ends providing an internal annular chamber 15. The segmental baffle plates 16 are formed integrally with the flanges 12 of the inner member and are spirally deflected, see Fig. III, so that as the air passes through the mixer it is given a swirling movement, thus insuring the effective mixing.

These baffiles or deflectors tend to throw the unvaporized fuel outwardly against the walls of the device so that it will flow down into the carburetor unless it becomes vaporized by the passing air. The annular groove like chamber 15 prevents its being carried upwardly into the manifold in an unvaporized condition. Any deposit of liquid would be retarded and if it reached the inner edge of the chamber would be broken up by the rush of air deflected at that point.

My improved mixer is highly eflicient, very economical to produce and is easily installed.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A device of the class described, comprising telescoped inner and outer tubular members adapted to lit within the intake pipe of a manifold and having attaching flanges at their lower ends adapted to be interposed between the coupling flanges of a manifold and a carburetor, the flanges of said tubular members having a packing gasket between them, the inner ends of said members terminating in inwardly curved flanges providing an annular internal channel, the inner member having integral downwardly deflected segmental blade-like spirally twisted baffle members.

2. A device of the class described, comprising telescoped inner and outer tubular members adapted to fit within the intake channel, the inner member having integral pipe of a' manifold and having attaching downwardly deflected segmental blade-like flanges at their lower ends adapted to be spirally twisted bafiie members. 10 interposed between the coupling flanges of In Witness whereof, I have hereunto set a manifold and carburetor, the inner ends my hand.

of said members terminating in inwardly curved flanges providing an annular internal ELMER H. MIDDAUGH. 

